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| PartNumber | AIT1USB3-18-1PS | AIT1USB3-18-4S0 | AIT1USB4-20-3SC |
| Description | Circular MIL Spec Connector ER 10C 10#16 PIN RECP | Circular MIL Spec Connector ER 4C 4#16S SKT RECP | Circular MIL Spec Connector ER 3C 3# 12 SKT RECP |
| Manufacturer | Amphenol | Amphenol | Amphenol Industrial Operations |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular Connectors |
| Series | D38999 III | D38999 III | * |
| Brand | Amphenol | Amphenol | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Packaging | - | - | - |
| Termination | - | - | - |
| Mounting Type | - | - | - |
| Features | - | - | - |
| Ingress Protection | - | - | - |
| Connector Type | - | - | - |
| Orientation | - | - | - |
| Contact Finish | - | - | - |
| Number of Positions | - | - | |
| Shell Size Insert | - | - | - |
| Fastening Type | - | - | - |
| Shell Size MIL | - | - | - |
| Shell Material Finish | - | - | - |